Evidence used
- No CISA KEV confirmation is currently recorded.
- A structured source references public exploit or proof-of-concept material.
- EPSS is 0.42% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-42999High confidence
OpenStack Keystone — Incorrect Authorization
OpenStack · Keystone
6.0MediumCVSS 3.1
Patch only the product branches with a verified fix
Fix availability varies by productMedium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:High, raised one band.upgradedsince 24 Jul 2026
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Increase monitoring for the attack path and post-exploitation behaviour described in the report.
Verification
- Confirm that the asset runs OpenStack Keystone and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
- Red Hat Product Security: 11 affected or under-investigation product states without a fixed product state in the same current advisory
Distribution package intelligence
5 package statesRelease-specific package status
Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Debian trixietrixie · source | keystone | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:27.0.0-3+deb13u4 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian bookwormbookworm · source | keystone | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:22.0.2-0+deb12u3 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian forkyforky · source | keystone | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:29.0.1-2 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Debian sidsid · source | keystone | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:29.0.1-2 | Debian Security Tracker ↗Source updated 6 Oct 2026 |
| Ubuntu 24.04 LTSnoble · standard archive | keystone | Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree. | 2:25.0.0-0ubuntu1.4 | Canonical Ubuntu Security ↗Source updated 5 Oct 2026 |
Open-source package ranges6 source-attributed ranges
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| PyPIkeystone | ECOSYSTEM: introduced 14.0.0; fixed 27.0.2 | 27.0.2 | OSV record ↗aggregator derived · 10 Sep 2026 |
| PyPIkeystone | ECOSYSTEM: introduced 28.0.0; fixed 28.0.2 | 28.0.2 | OSV record ↗aggregator derived · 10 Sep 2026 |
| PyPIkeystone | ECOSYSTEM: introduced 29.0.0; fixed 29.0.2 | 29.0.2 | OSV record ↗aggregator derived · 10 Sep 2026 |
| pipkeystone | >= 14.0.0, < 27.0.2 | 27.0.2 | GitHub advisory ↗github reviewed aggregator · 2 Jul 2026 |
| pipkeystone | >= 28.0.0, < 28.0.2 | 28.0.2 | GitHub advisory ↗github reviewed aggregator · 2 Jul 2026 |
| pipkeystone | >= 29.0.0, < 29.0.2 | 29.0.2 | GitHub advisory ↗github reviewed aggregator · 2 Jul 2026 |
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
CVE-2026-42999 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityopenstack-keystone: OpenStack Keystone: Unauthorized access and privilege escalation via arbitrary policy attribute injection
The vendor explicitly identifies these products as affected by this CVE.
- rhosp13/openstack-keystone as a component of Red Hat OpenStack Platform 13 (Queens)
- openstack-keystone as a component of Red Hat OpenStack Platform 16.2
- openstack-keystone.src as a component of Red Hat OpenStack Platform 16.2
- python3-keystone as a component of Red Hat OpenStack Platform 16.2
- rhosp-rhel8/openstack-keystone as a component of Red Hat OpenStack Platform 16.2
- openstack-keystone as a component of Red Hat OpenStack Platform 17.1
- openstack-keystone.src as a component of Red Hat OpenStack Platform 17.1
- python3-keystone as a component of Red Hat OpenStack Platform 17.1
- rhosp-rhel9/openstack-keystone as a component of Red Hat OpenStack Platform 17.1
- openstack-keystone.src as a component of Red Hat OpenStack Platform 18.0
- rhoso/openstack-keystone-rhel9 as a component of Red Hat OpenStack Platform 18.0
- Summary
- A flaw was found in OpenStack Keystone. This vulnerability allows an authenticated user to bypass Role-Based Access Control (RBAC) checks by injecting arbitrary policy target attributes into the request body. This enables the user to perform unauthorized operations on resources belonging to other users or projects. The issue stems from the Keystone RBAC policy enforcer unconditionally merging the raw JSON request body into its policy enforcement dictionary, which overwrites trusted data.
- Remediation
- Affected
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product01
What, why and how
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
What
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material Reference recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.
- Likely attack path
- a network path → Incorrect Authorization → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- User interaction
- None
- Attack complexity
- High: exploitation depends on specific conditions
- Security boundary
- Changed: exploitation can affect a different security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-863 ↗
CWE-863: Incorrect Authorization. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:LCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ALowAvailability impact: A successful attack can cause a limited loss.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix availability varies by product
- Affected
- rhosp13/openstack-keystone as a component of Red Hat OpenStack Platform 13 (Queens)
- openstack-keystone as a component of Red Hat OpenStack Platform 16.2
- openstack-keystone.src as a component of Red Hat OpenStack Platform 16.2
- python3-keystone as a component of Red Hat OpenStack Platform 16.2
- rhosp-rhel8/openstack-keystone as a component of Red Hat OpenStack Platform 16.2
- openstack-keystone as a component of Red Hat OpenStack Platform 17.1
- openstack-keystone.src as a component of Red Hat OpenStack Platform 17.1
- python3-keystone as a component of Red Hat OpenStack Platform 17.1
- rhosp-rhel9/openstack-keystone as a component of Red Hat OpenStack Platform 17.1
- openstack-keystone.src as a component of Red Hat OpenStack Platform 18.0
- rhoso/openstack-keystone-rhel9 as a component of Red Hat OpenStack Platform 18.0
- Action
- Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 28 May 2026 · Last source change 24 Jul 2026, 12:05 UTC · CWE-863 · Incorrect Authorization
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-33241
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
CVE published
Fixed release or patch reference recorded
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.